Plate carrying cylinder



Allg 23, 1933 H. A. w. wooD 1,873233 PLATE CARRYNG CYLINDER Original Filed May 26, 1926 7%7//y Wre Waal y mvv-33:7: /LW W 1%;

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,Patented Aug. 23, A1932 UNITED STATES PATENT OFFICE .N

HENRY A. WISE WOOD, OF NEW YORK, N. Y.,

AssIGNon To woon NEWSPAPER uuicnm-V ERY CORPORATION, F NEW YORK, N. Y., A 001531.30155,A TIONOIIE VI [R(a`rI1\l`Il.'A-

PLATE CARRYING CYLINDER.

Original application filed May 26, 1926, Serial No. 111,787. Divided and this application` iiled 1929, Serial No. 353,199. y.

This is a division of my application Serial No. 111,787, filed May 26, 1926.

The principal objects of this invention are to materially reduce the expense o-f preparing the plate cylinder for the clamps and clips; to provide an arrangement of clips on the plate cylinder that will permit the printing of the product with as narrow a margin as may be desired, and to provide .a plate cylinder with as few recesses as possible to secure a more solid support for the plates.

Other objects and advantages of the invention will be described hereinafter.`

Reference is to be had to the accompanying drawing in which Fig. 1 is a plan of the plate cylinder showing a preferred form of this invention;

Fig. 2 is a longitudinal sectional view on the line 22 of Fig. 1 on an enlarged scale, and

Figs. 3, 4 and 5 are similar enlarged sectional views on the lines 3-3, 4-4 and 5-5 in Fig. 1.

It is customary to mill in thek plate cylinder long T-headed slots in which the plate clamps move, which is a very expensive operation. T reduce this expense by merely driving round holes for the clips, round holes for the clamps, and turn slots on the ends of the cylinders for receiving a tongue on the end clamp.

Fig. 1 shows one-half of a cylinder, the other half being identical therewith. It is to be seen that in the center of the cylinder is fastened a margin ring 48. This is of dovetail section to hold two sets of plates P on opposite sides. Itis provided with a base ring 49 sunk down into the cylinder so that the screws 50 for holding the margin ring are not in the plate holding section which projects beyond the cylinder. By providing a groove around the cylinder for the base of this ring, the raised portion of the ring is independent of the diameter or length of the screw heads so that as narrow a margin as may be desired may be had by thinning the projection down to its lowest possible dimension.

The intermediate dove-tail clips 51 are of .short length and each cylindrical clip holder Renewed June 10, 1932. Y

52 is let into a round recess 59 driven or bored in the rcylinder adjacent tothe margin ofa plate. Thesef holders have diametricalways on which the base^ portionsof the clips are moved by the clamping of the plate-by the screw 56, of the plate.` Theclip is held in position by pins projecting intoV the base portion 61. The latter .is limited in position by two stop pins 53 projectingV in oppositedirections against the wall of the recess. 59 in which the same is located. The holders 52 are secured in place by screws 63.

The end clip or ring 55 is madeup of segments which in Vthe lform indicated, occupy one quarter of afull circle each. `Therefore, two of thesesi'egments hold the end* of each 1 plate but each segment is operated bya single screw 56. Each" segment is providedwith a Avril: e

lip 57 which enters'an annular groove 60 Y turned all around in the end ofthe cylinder 18. This is'for guiding the clip and also preventingv itslifting under pressure. The clamp screw 56 is threaded in a roundv nut 58 which is dropped into .acircular hole 62, drivenor bored inthe cylinder. The screw has a square endv and there is spaceenough'to reach it foroperation. g I Y yThe construction of these clips provides a plate cylinder vwith as few recesses asrpos-l sible.l This furnishes. a moresclid support than usual foreachl plate.Vv By housingthe clamps `58 and clips 52 in round holes bored into the cylinder a material saving'f'over the old` nethod' of m'illinggrooves for them is ef,-l fecte 5' Although I` have 'illustrated' and described only one form of the invention Iv amaware ofthe fact that V modiiications can be made therein by any person skilled in the art with? out departingfrom the scope ofthe invention' as expressed in' the claims. Thereforel do not wish to be limited in thisy respect but what I claim is 1. A printingplate cylinder having a se-kf ries of round recesses bored into it between two plates on the cylinder, a plate cliphaving a cylindrical holder 'setinto eachof said recesses, said holder having guides in which the clip is adapted to move freely in a longi# tudnal direction and means proj ectingfrom sections on the cylinder.

3. As an article of manufacture, a plate cylinder for a printing press, having aclrcular groove around itat the center, a cir-VV culary groovearound it extending in' on'veach forholding the ends of two plates, and stop pins on the opposite ends of the clip holders vfor limiting their motion in the recesses.

In testimony whereof I have hereunto afiXed my signature. f Y

HENRY ArWISE WOOD.

end surface for holding the plate clip, a series of. recesses spacedlfroni each other around its circumference` on each side Vof the vcenter groove and half way between the center grooveV and the ends? ofthe cylinder, and recesses at each end, cylindrical injformfpr use in fastening the end clips. 4. The combination with cylinder, of a center margin ring extending entirely around ,Y the cylinder and having a I dovetail shaped cross section and held in place by means below the surface of the cylinder, said cylinder having a series of recesses spaced from each other around its circumference between the center margin ring and the end of the cylinder, of a series of center clips, each set into a recess in the cylinder, end clips in the form of'quarter sections, and means located below the surface of the cylinder for fastening adjacent end ring 5. A' printing plate cylinder having round a Yprintingy plate f recesses bored radially therein near the ends,A i

cylindrical nuts set into said recesses, end plate clamps adjacent to the nuts and clamp- ,y ing screwsk extending longitudinally ofy the cylinder Vfor connecting the clamps with the nuts. v 6. The` combination with a printing plate cylinder andan end clip for engaging the ends of the-printing plates,k having a plate,

engaging-projection, of means for holding thev end clip in position comprising a cylindrical nut, and a screw projecting longitu-V dinallyfrom the end clip into said `nut for tightening the clip in place, the cylinderhaving-a cylindrical recess in its `surface for receiving said nut.

7. The combination with a printing plate cylinder, of an end clip for engaging the ends of the printing plates having afplate engaging projection and a lip projecting inwardly, spaced from said projection, the cyl- Y inder having a circular end groove. for receiving said lip, whereby the' clip will under heavypressure. Y Y

Y 8. The combination with a-printing plate not Vlift cylinder having recesses in its surface, of a series of intermediate clip holders sunk into said recesses and provided with dovetailclipsL projecting above the surface ofthe cylinder; 

